The Asahi Shimbun has compiled a list of major companies that have disclosed personal information breaches or the risk of such breaches since September 2026. The dates are primarily the dates of disclosure and include cases from 8 October and earlier.
Cases in which personal information has been reported to have been leaked amid incidents such as unauthorized access targeting companies have been occurring one after another. The article compiles a list of major companies that have disclosed since September that personal information may have been leaked.
The list is organized by date and includes disclosures made on 8 October, 7 October, 6 October, 5 October, 4 October and 28 September, among others. Although the article lists the names of individual companies, it does not specify whether additional information is available at this time or whether further updates are planned.
Related topics covered in the article include preventing the recurrence of information leaks, the response of the National Police Agency and emergency warnings, but the article focuses mainly on the companies that made disclosures and the timing of those disclosures.